Konica Minolta bizhub 420 - Manual (Page 166)

Setting Up the PCL Driver 5
IC-204 5-34
Print with Black
Prevents fine lines which is colored, colored characters, graphics, etc. from
being printed light.
1
Click the Quality tab.
2
Select the “Print with Black” check box and select either “Text and
Graphics” or “All”.
Text and Graphics Colored characters and graphics are printed in black.
All All objects including the image data such as photo image are
printed in black except for white areas.